I know you can apply for a visitor visa (temporary residence permit) at the same time you submit your inland PR application and they will give it to you automatically because there is a PR case in process... Maybe you should try and get a new (or extended) work permit instead?? NOT based on the PR application, but the standard way... I doubt it will be granted, though, because you overstayed your previous one... You were supposed to leave Canada, you know it, so you broke the rules... A work permit is a temporary stay visa...
http://www.cic.gc.ca/english/information/applications/spouse.aspWhen someone of my close family applied inland in 2009 under spousal sponsorship, they received 1st stage and 2nd stage approval letters around the same time, 18 months after applying!!! So they got their PR in a month's time after that and so, obviously, there was no sense in applying for an Open Work Permit...
And I can't stress enough that you should make every effort to prove your marriage being bona fide and not a marriage of convenience, which they will suspect based on your situation with work permit, you staying illegally etc etc...........