recoding value labels within a variable

#1
Is there a way to change multiple value labels within one variable to the same value label without going through each case one by one?

I have successfully combined many values into a new file by selecting cases using the "if" function, but the new file still retains old value labels. SO - when I merge this file back into the larger data set and try to run statistics, the program has no way of identifying that the data from the combined file should be examined as one value.

I've noticed a transform/Recode function for variables - can I do a similar thing with values of variables?