jnix,
There are probably other options, but these formulas will work. The following provides you with two options 1) without the ".xls" suffix, and 2) with the suffix.
enter in A3: =CELL("filename",A2)
enter in A4: =FIND(".xls",A3,1)
enter in A5: =FIND("[",A3,1)+1
enter in A6: =MID(A3,A5,(A4-A5))
enter in A7: =MID(A3,A5,(A4-A5)+4)
Hope this is what you wanted.
Regards, ...Dale Watson dwatson@bsi.gov.mb.ca