schedule a script at "system startup"

[Ian Lord]

Hi,

I would like to run a shell script at system startup which needs to 
run under a specific uid...

I don't see anything for this in man cron...

is there a way to do it with cron ? or otherwise is there another way ?

I guess there might be a way to put a script in /etc/rd.d/ but I 
don't know how to run it under a specifid uid

Any help would be appreciated

Thanks