I'm pretty sure I did the sync the wrong way which is my fault - and now i've tried it so many times - in both directions that i have no hope - my fault of course - i think because i was tired i misunderstood the prompt.
From memory i believe i did "sync from itunes" first - but the box below only produced start... finish
after this did nothing - i attempted the opposite way : i think, that due to my tiredness i misread the "are you sure you want to replace all WMP info with itunes info" - at the time i think i understood this as all information from wmp would be changed to itunes, which is incorrect? i have no files in wmp, was this the problem?
after this failed, i synced from wmp - i think i had added all of my files into wmp at this point even though the names did not come up - this seemed to make progress and started removing all names from itunes and not bringing anything up in wmp.
I am under the understanding that i did it the wrong way wrong, or in some way wrong, however, could you please explain to me the exact way this works? ie. just to check the sync from putting all itunes tags into wmp? and vice versa, as i can probably get all my music back from cds and typing the tags in to an extent but if i end up in a month with an ipod i would like to be able to sync the tags between the problems. If i load all of the cds back into itunes and a new folder on my harddrive, would it be sync from itunes? and will i need all the files added into wmp already? i am very confused, i am sorry for my lack of understand, maybe i've got the idea entirely wrong
i sadly rushed the process 
i downloaded the first version i saw, which was from the first post i believe, i later found out there was a later version but my internet (even though its dsl) is being very slow this week and i didnt have the time to find, even get to another page without it somehow going wrong.

when you say wmp to fill in the blanks, do you mean have it search from the internet?