Just a quick note here,
Running 98se here and also using opera.
I had tried the rapidshare link but don't have an account so on my previous install (Just did a reformat after having dropped my antiquated toshiba laptop, pooching some critical sectors on the massive 6GB hard drive
(Even has an amazing 64MB of RAM!!
But hey it works, and I'm on a virtually nonexistant budget,,, )
Anyway, the last time I had to use the msimg.dll I ended up going with what was most likely the newer version for XP etc. from dll-files.com and had the same "File is in use" error
So rather than remove it, I just changed the extension to .old and moved the new copy into the system folder.
I cant say it worked perfectly as I had a number of badly displayed graphics artifacts on some sites like yahoo, but it worked better than before (Slightly faster response time in pages loading images.
On a side note I was wondering if perhaps anyone had a link to a free and easy download of the ME version of the msimg32.dll around somewhere??