I'm afraid that I know the answer to this but I thought I'd ask anyway ...

Is it possible to insert columns for only a certain section of the
spreadsheet, i.e., to affect only a certain range of rows?

Over the years, I've created a spreadsheet with about 300 rows (and with a
6,000-line macro) and now realize that I need about 10 extra columns ... but
only in a certain part of the spreadsheet (rows 100 to 150).

If I insert columns, the ENTIRE spreadsheet (from row 1 to 65536) is going
to be affected (and all of the address references in my macro will have to be
redefined) and then I'll have to cut-and-paste all of the fields from rows 1
to 99 and 151 to 300 back over to their original columns and then all my
row/column references are going to get screwed up and it's going to become a
major hassle.

So, I thought that there might be a trick to inserting columns in specific
rows without affecting any of the other rows. (Wishful thinking, I know.)

Thanks. Dan