I have researched your issue and found a tool that will do its best to retrieve what it can from the corrupted pst file. If you did go over your 2 gig limit (which is what it sounds like from what you described and what I just read) than this program is your only hope and than after running this you mayhave to run another repair program which I will post after you post how this works for you http://www.microsoft.com/downloads/details.aspx?FamilyID=B33B1DFF-6F50-411D-BBDF-82019DDA602E&displaylang=en&displaylang=en
You can also use this tool that microsoft made to try to recover your info here is the link to download it http://www.microsoft.com/downloads/details.aspx?FamilyID=B33B1DFF-6F50-411D-BBDF-82019DDA602E&displaylang=en oh and here is the microsoft guide for this issue which has step by step instructionshttp://support.microsoft.com/kb/296088 I really hope this helps you! Please use my advice at your own risk! I am not liable for anything that may happen from the links or info I have provided.