Looking for ACDsee alternative.

[Smurfette]

irfanview is better hands down

Are you your country's entrant for the Dickwad Olympics?
That's a fucking stupid statement.

[Smurfette]

One assumes you are registering your disagreement.

Aye.

[Smurfette]

Do you intend elaborating, or just leaving it at the simple insult.

Heh. Why elaborate? You're not interested, just as the rest of us are not interested why Irfanview may be better "hands down" than ACDSee. Which it ain't, in any area other than startup speed.
Ayethankyou.

[Vargas]

in irfanview:
File -> Thumbnail, or simply press T - the keyboard shortcut
then select "File -> Create contact sheet from selected thumbnails"