SAPINST.EXE not executing...

Dear inst experts,

I have standard dump and I am using Win_Ser_'03. While trying to install SAP thru this path F:\SAP\NW2004sSR2\BS_2005_SR2_IDES_Installation_Master\IM_WINDOWS_I386, I am getting error saying that "creating process temp\sapinst.exe.1188.1305352075\sapinst.exe failed" and also saying "child has signalled and exec error keeping dir temp/sapinst.exe.3776.1305352258. Pls help me in this regard. Can I find a working sapinst.exe file.