XP install, missing .dll files?

Factual Questions
1

I was re-installing XP Pro this weekend and I rather absentmindedly deleted a partition (the pc had originally a large C and a small D drive. Windows was on the C drive. I don’t know what was on the D drive, maybe temp stuff?). Smart, huh?

When XP finally loaded, Windows could not find the following files:

Msnmetal.dl_
Msnmigr.dl_
Msnms.ic_
Msnspell.dl_
Msnunin.ex_
Msnupgrd.in_
Msnntmig.dl_

The underscore signs were on the screen. I assume .dl and .ex are .dll and .exe files, but what is .ic and .in?

Should I seek these files out and download them, or are they obscure networking files I’ll never need?

I am assuming my deletion of the D drive led to Windows not finding my files, is this correct?

2

My initial thought is that you can live without the files. However, you may try to do an install repair with the XP CD.

3

It’s not a good idea to leave missing .DLL files on your system. You never know when an application or the system needs to use them. Can you reinstall Windows again?