>>I always start VFP9 with the -C parameter, this the actual line I use for my first session: -cd:\FOXJOB\WIN1\CONFIG.FPW.
>>
>>When I start another session of VFP, I replace Win1 with Win2, WIn3 or Win4. This makes it possible to have up to four sessions active at the same time, without any danger of conflict.
>>
>>In the Config.fpw's I have different values for the temp files: "TMPFILES=d:\FOXJOB\winX\temp" where X matches the corresponding session number.
>
>Thank, excellent suggestion.

I do not start VFP directly - I "start" the fpw, and that starts the VFP IDE with resource file etc set for the specific project.
Basically the fpw sets what only an fpw can set - and then calls out to a project-specific prg to do the rest of the setup. (What gathers the parameters for a global start handler .... )