Divide Single Row Date Values In Two Rows & Transfer Values

Hope you can help with this:

In worksheet "TOTALS" and Range "M11:N251" there are "from:to" time periods inserted by user ("From" is in "M11:M" and "To" is in "N11:N"). Number of rows (and inserted time periods) may vary. Time periods are quadrimester (4months) but not always 120 days (could be 119, 122 or sth like that - if less than 100 then user must not be allowed to divide). Range "W11:W251" hosts amounts of money. So, for example, "M11:N11" can be 1/1/13-1/5/13 (dd/mm/yy) and W11 just a number (i.e. 98,45).

I want to be able to divide each time period almost by 2 (first part can be 60 days, second part rest of days) and amounts accordingly (depending on the number of days of its divided period) and transfer the divided periods and amounts to a new worksheet (TOTALS2) to -let's say- range "A11:B251" & "G11:G251").

So, in the above example, in "TOTALS2" we'll have 1/1/13-1/3/13 in "A11:B11" and 1/3/13-1/5/13 in "A12:B12", and the divided amounts accordingly to the counted days of "A11:B11" & "A12:B12" in "G11" and "G12".

And so on until there are no more time periods & amounts in TOTALS to divide and transfer to TOTALS2.

How can this be done? Ideas?

Thanks in advance!