diff --git a/OVMF/OVMF_VARS_4M.fd b/OVMF/OVMF_VARS_4M.fd
index 91d56fa..4eebbda 100644
Binary files a/OVMF/OVMF_VARS_4M.fd and b/OVMF/OVMF_VARS_4M.fd differ
diff --git a/OVMF/OVMF_VARS_4M_d.fd b/OVMF/OVMF_VARS_4M_d.fd
index c075991..a873cd4 100644
Binary files a/OVMF/OVMF_VARS_4M_d.fd and b/OVMF/OVMF_VARS_4M_d.fd differ
diff --git a/build.bat b/build.bat
index 9b37aa7..06cbeba 100644
--- a/build.bat
+++ b/build.bat
@@ -3,7 +3,7 @@ setlocal enabledelayedexpansion
 
 set ROOT=%~dp0.
 set SRC=%ROOT%\code
-set DEST=G:\
+set DEST=%NTLITE_DRIVE%
 
 if exist "obj" rd /s /q "obj"
 if exist "bin" rd /s /q "bin"
diff --git a/code/kernel/kmain.c b/code/kernel/kmain.c
index ba410c3..9bb2793 100644
--- a/code/kernel/kmain.c
+++ b/code/kernel/kmain.c
@@ -107,21 +107,19 @@ static void InitializeDrivers(BOOT_INFO* bootInfo, const HAL_API* hal) {
 
         // Load the driver
         size_t len = strlen(runtimeKeys[i]);
-
-        // Assemble the path
-        // "drivers\" is 8 chars; +1 for the NUL terminator already in len.
-        size_t pathLen = 8 + len + 1;   // len already includes the NUL from strlen+1 above
-        char *path = MmAllocatePool(pathLen);
+        char* path = MmAllocatePool(len + 10);
         if (!path) {
-            DbgPrint("InitializeDrivers: OOM building driver path\n");
+            DbgPrint("KernelMain: Failed to allocate memory for driver path. How?\n");
             continue;
         }
+
+        // memcpy manouvers
         memcpy(path, "drivers\\", 8);
-        memcpy(path + 8, runtimeKeys[i], len);   // len includes the NUL
+        memcpy(path + 8, runtimeKeys[i], len + 1);
 
         s = IoOpenFile(path, &f);
         if (s != STATUS_SUCCESS) {
-            DbgPrint("InitializeDrivers: Failed to open runtime driver: %s\n", runtimeKeys[i]);
+            DbgPrint("InitializeDrivers: Failed to open runtime driver: %s (%s)\n", runtimeKeys[i], path);
             continue; // Skip this driver but keep going with others
         }
 
diff --git a/readme.md b/readme.md
index acac5c5..158622c 100644
--- a/readme.md
+++ b/readme.md
@@ -25,12 +25,13 @@ It boots into a shell.
 
 ## how 2 build
 
+* open env variables
+* set `NTLITE_DRIVE` as your thumbdrive (ex. `G:`)
+* set `NTLITE_NTPATH` as your thumbdrive (ex. `\\.\PhysicalDrive7`)
 * open vs x64 build tools
 * cd into this directory
 * `build.bat`
-* open `run.bat`/`rund.bat`/`runa.bat`/`runad.bat`
-* replace `\\.\PhysicalDrive7` with your thumbdrive partition
-* `run.bat`/`rund.bat`/`runa.bat`/`runad.bat`
+* `run.bat`(ide)/`rund.bat`(ide, debug)/`runa.bat`(ahci)/`runad.bat`(ahci, debug)
 * enjoy
 
 ## how it looks when built
diff --git a/run.bat b/run.bat
index 34a2c91..6c6b6ef 100644
--- a/run.bat
+++ b/run.bat
@@ -1 +1 @@
-@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M.fd -drive format=raw,file=\\.\PhysicalDrive7 -serial stdio
+@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M.fd -drive format=raw,file=%NTLITE_NTPATH% -serial stdio
diff --git a/runa.bat b/runa.bat
index 2027537..1a48adc 100644
--- a/runa.bat
+++ b/runa.bat
@@ -1 +1 @@
-@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M_d.fd -device ahci,id=ahci -drive format=raw,file=\\.\PhysicalDrive7,if=none,id=disk0 -device ide-hd,bus=ahci.0,drive=disk0 -serial stdio
+@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M_d.fd -device ahci,id=ahci -drive format=raw,file=%NTLITE_NTPATH%,if=none,id=disk0 -device ide-hd,bus=ahci.0,drive=disk0 -serial stdio
diff --git a/runad.bat b/runad.bat
index fa2278a..f9ebbb6 100644
--- a/runad.bat
+++ b/runad.bat
@@ -1 +1 @@
-@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M_d.fd -device ahci,id=ahci -drive format=raw,file=\\.\PhysicalDrive7,if=none,id=disk0 -device ide-hd,bus=ahci.0,drive=disk0 -m 4G -serial stdio -d in_asm,cpu_reset,int -D qemu.log -no-reboot -no-shutdown
+@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M_d.fd -device ahci,id=ahci -drive format=raw,file=%NTLITE_NTPATH%,if=none,id=disk0 -device ide-hd,bus=ahci.0,drive=disk0 -m 4G -serial stdio -d in_asm,cpu_reset,int -D qemu.log -no-reboot -no-shutdown
diff --git a/rund.bat b/rund.bat
index 4c5cff4..a597b1d 100644
--- a/rund.bat
+++ b/rund.bat
@@ -1 +1 @@
-@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M.fd -drive format=raw,file=\\.\PhysicalDrive7 -m 4G -serial stdio -d in_asm,cpu_reset,int -D qemu.log -no-reboot -no-shutdown
+@start qemu-system-x86_64 -drive if=pflash,format=raw,readonly=on,file=OVMF\OVMF_CODE_4M.fd -drive if=pflash,format=raw,file=OVMF\OVMF_VARS_4M.fd -drive format=raw,file=%NTLITE_NTPATH% -m 4G -serial stdio -d in_asm,cpu_reset,int -D qemu.log -no-reboot -no-shutdown