InfoPath Dev

Is there any way to take the form I already have working and move it to a local location so that it is no longer linked to the sharepoint site?  I dread having to recreate it from scratch.  And does working locally include a network share?  I and another person share design responsibilities. I had tried saving locally and renaming, ...

I created an InfoPath form in Shared Documents called "Purchase Request".  I have since needed to rename it.  I can open the newly named file to complete the form, but I cannot go into design more.  I get an error saying "Could not open "....../Purchase Request.xsn".  The next box says that ...