I got called for a train that had the symbol of a grain train, but it was all tanker cars- that's a new one on me. 100 tanker cars, with 3 motors on the head end and 2 on the rear. Our IPADS said that at Barstow we would have to set out our two DPs and then pcik them up again- which made no sense. We had a good trip to Barstow and they brought us into Main 1. Then they told us to move our DPs from the rear of the train to the middle of the train. This was not going to be easy. First, I took a van to the middle of my train. I tied the brakes on cars 51 thorugh 60. We did a release test and it held. Then I made the cut. I had the van run me to the head end of my train, and we moved up to the "Mohave Connector. " I tied the first 10 cars while my engineer tied the 3 motors. We did a release test and it held. The van ran us to our DPs. I cut the DPs away. They were both facing east. We waited for permission to come out of the east end of Main 1 and run around our cars on Main 2. This proved to be the longest part of the job. Finally they gave us authority to come out. We moved east into the Amtrak siding. Since we were facing east I had to protect the shove. I rode the steps of the second motor. Boy, it was cold and windy! We shoved into Main 2, around our cars, and then onto the Mohave Connctor. I brought us to a hook at the rear of our train. I laced the hoses, cut the air in, and the van ran us to the head of our train. I released the 10 brakes I had tied earlier. Then I had the van run me as close to the rear of the train as it could-it could not go all of the way to the rear- and I climbed into the cab of the rear DP. We would have to shove back and make the hook with our train. The dispatcher told us to stop when we came to the Rio Seco signal. We shoved back. When the Rio Seco signal was in sight I stopped us and called the disptacher. We had to "flag" the signal. He recited a script and I repeated it. We then shoved back into Mian 1 and made the hook. I got out, laced the hoses, cut the air in, and released the 10 brakes I had tied earlier. All that was left was to hang the ETD on the rear of the train. But, Mechancical had not brought an ETD out to us, and we were almost DOL. The outbound came out to relieve us. We briefed them. The train was going north, to Bakersfield and it would need helpers on the rear. That's why we had to do all of this work. I tied up right at 12 hours, slept in my hotel room all day, and got called for the "Z STOWSP." Normally thisi s a longpool train, but there were no longpool crew available so they put a short pool crew on it, and it had to be dog caught. We got on at the steps. It was a good trip. Once we left Barstow they ran us all of the way. When we got to Needles they told us to tell our outbound to pull down to the East end as there were two opern containers. I rolled my train by and tied up. I'm supposed to catch a Z train at 4 pm today. I have included a picture of the leader on the Z train, the 7740.