DTP issue

Hello, I have a question regarding a dtp delta. I have a DSO which has millions of records in it. and there is a cube on top of it. i dont want all that data in the cube. and on daily basis i ONLY want a certain currency type '10'. ok. so, i broke the data loads in to many pieces by using multiple dtps (Full loads). and i had already stopped loading the dso. so now the data is all loaded in my cube and i want to enable the delta dtp again with the currency type '10' so how should i do that? can i do a fake delta load and then enable the regular delta load of currency type '10'? please let me know.