Editing Autoexec.bat via VB5

My application needs to create a new path on the destination pc in autoexec.bat - c:\windows\lhsp - in order for it to work. How is this done. Presumably through editing setup1.frm for the VB setup wizard?

Also can Shell be used from setup1.frm. For example

nRc = Shell("regsvr32.exe (WinPath)\Lhsp\ttsmgr60.dll", vbHide) to register a self-registering file.

If I do this several times, does Shell continue running. Ctrl+Alt+Del seems to show several instances.

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