OK, here is a quick lesson in how to remove the decimals and units for a CC part. Use the 'Open from Content Center' option on the Open pull down under the main Inventor menu. Save a part from the family you need to modify using the 'As Custom Option'. Edit the parameters for that part and mark the G_W, G_H, G_T, G_L, etc parameters for export. Then right click on one of those parameters and choose the 'Format Parameters' option from the popup. Now select the precision, turn off the units and trailing zeros; for metric units the leading zero is normally left on. Save this file and close it. Go to the CC and select the family, then right click and select 'Replace Family Template', choose the file you just changed for your new template.