I've looked it up in the database: GEELA4.25L goes over MNSTR to GATWA, from where you have to expect ATC vectors to the final approach (which begins at FIXAR) GEELA4.07R goes over PUNNT to CAGOR, from where you have to expect ATC vectors to the final apporach (which begins at ALLIS). So by choosing the destination runway 25L vs 07R you choose whether the STAR continues with MNSTR or with PUNNT after GEELA. In my database, BLH transition to GEELA goes over SCOLE-SNNRA-LZIRD to HYDRR, SPINK is not in the route - perhaps it was added in a newer cycle. The chart you posted is effective with 1112, the database shipped with the CRJ is older. If you want newer data, you can buy it at http://www.navigraph.com Philipp EDIT: Checked with cycle 1201 - SPINK is in there.