I have not used ParseExcel myself and so I cannot comment on the limitations. As CountZero said if you can export to CSV from Excel or GNUmeric then that will save you a lot of work!

I did not understand why you need to copy them in slices and paste into text editor. Doesn't GNUmeric allow you to export to CSV directly? Even if it doesn't I hope it should still let you 'select all' and then paste it in your editor. I am guesssing it will paste them as "tab" delimited. So if you are familiar with vim (you can use your favorite editor too that support regex) to change from tab delimited to CSV - :%s/\t/,/g. Perl can work with tab files directly but if you want CSV then this is one option (you can tr, s// in Perl too!).

I have used jmcnamara's Spreadsheet:WriteExcel and it works beautifully (really fast on Linux machines!). I think he also gives you another module to work with files > 7MB.

I found this post Reducing the memory usage of Spreadsheet::ParseExcel by jmcnamara. Hope this helps!

cheers

SK