Another option would be to subtract the value you want from the target cell and then set solver to a value of zero (or min if you use the abs function).
With this method solver has the same settings everytime and you don't need to learn VB.
Never mind, I just reread the post. electricpete is right, I don't think you can format the cells to round up. But you can write your own roundup function :)
you can preform text functions on a numeric value. SO... search for the "." in the text string <<find(".",A1))>>, then take everything before that location in the text string minus one <<Left(A1,find(".",A1)-1)>> Finaly just add one <<Left(A1,find(".",A1)-1)+1>> and you'll have a simple formula...