PNG Animation Util??

Hello all,

Have 1200 PNG files I need to put into a file(s?) that can be read with "LoadAnimImage". Can't find a utility that will allow creation of the proper format (PNG) with this many/size files. Prefer to do an entire directory at once (they are in alpha order). Tried using Jasc Animation Shop but no-go (file/save options <> PNG).

Read somewhere "LoadAnimImage" is limited to 1024 frames? Using B+.

Suggestion/comments appreciated.

Thanks in advance,
Jim