if you want your report to 'reclaim' the space used by the suppressed column, ie shift to cover the area...it can be complicated. If it is only 1 column, life isn't too bad.
On the other hand, there isn't a Crystal 2005, are you referring to the version that came with VS2005? If so you might be out of luck....
Right click on a field, if there is an option 'Size and Position' then you can craft a 'formula' using the x-2 button to shift your columns left or right by an amount x.
The caveat here is that the amount moved is in twips, which are 1440 to the inch. So to move column to the left by 1 inch you would put in the (original location * 1440) - 1440 in an if statement so that it only moves if some condition is met.
You can have multiple fields suppressed but you will need to have a mechanism to account for which fields are how big and how to shift the fields around.
I have done this once for an entire report, but it was 5 years ago and I don't remember all the details.