Use the "New PICT" macro to create a new PICT resource and change its ID number.
MODIFY MACRO: Change the last step Text to the first digits of the PICT ID #'s you want to use. For example, to use ID #'s starting with 2000 for a 4 frame animation, change the text to "200". Then all you have to do is type in 0 for the first frame, 1 for the next, 2 for the next, and 3 for the last. If you want to start with ID #2000 and make a 11+ frame sequence, use "20" and type in 00, 01, 02,...10. Basically, put the numerals in the Text macro which are common to all frames of your animation sequence.
MUSTS: You must have ResEdit open with the list of PICTs window active.
TO USE: Do the first one manually by choosing Create new resource (Cmd-K), choosing get info, and typing in the correct ID# (ie, 2000). Now trigger the macro. It will close the info window, drag the window for the new PICT off to the right, then create another new PICT resource and allow you to finish typing in its ID #. When you have entered the rest of the ID #, trigger the macro again. When you enter the last PICT's ID#, trigger the macro and let it run until it drags the window off to the right. Then click and cancel the macro.