Transferring Photoshopped jpgs from mac to Pc?

Question

This has been somewhat addressed on previous threads, but I couldn't find a simple answer, so I'll ask it again.  I just did a huge project, Photoshopping 700 photos on a Mac, using an old version of Elements (2.0).  When loaded back into a PC, I got the two files that previous threads have talked about, a small one with the "._P" before the regular name, that has ID data etc, and then the actual jpg file with its regular correct name. Except-- those don't open in the regular Windows Photo and Fax Viewer.  They will open in some other apps, like Explorer.  I put them through Irfanview, a free app that has a viewer (that does work for these), which does a batch conversion, and "converted" the jpgs to jpgs (!)--that worked for 2/3's of the pictures, but even there the files ended up being different sizes, and I don't know if my hard work is getting changed in the process, so this approach isn't desirable, plus it doesn't work for all of them anyway.  Surely--hopefully-- there must be a simple non-lossy way to deal with what has to be a very common problem???
All saviours will be hugely appreciated--thanks!

Answer 1

Barbara-- I just found an answer on a previous thread that seems to work-- dragging the jpgs on the mac from their folder onto the desktop, and then from there on to the thumb drive.  I still get the two forks, but the main one opens.  Question: (unless you know a better way to go that doesn't create this)-- is there any reason not to delete the data fork?  It seems to open fine when it is deleted.