From a proc, you can invoke DTSRUN to run the package via the shell. One of MANY ways to do this could be to invoke master..xp_cmdshell to fire it off.. There are other ways to do this through DTS's active-x interface as well..
Of course, Roberts recommendation should be followed by all that visit this site: read books-online. It contains invaluable sources of information for many topics discussed in this forum.
Tom