I use EW Gold box set. Just load the current Play engine. It should show up as a virtual instrument. Once Play is open, select the type of instrument you want. You can setup multiple tracks with different instruments. Once you have the number of instruments you want, save as a template.
I have the orchestra instruments stored on a separate hard drive. I have a SSD for OS, a HHD for the EW, and a HHD for recorded files.
I have the EW Gold grand pianos and gold symphony box sets.
I have had no problems with the Play engine.
Hope this helps.
Mixcraft8RS(418)64Bit, Win. 10 64Bit, Intel i5 @ 3.20GHz, ssd 250GB(os), 1TB hhd(library audio), 1TB hhd (recorded audio), Nvidia GeForce1050i video, 16GB RAM, Focusrite 18I20 2nd gen usb, Motu 5 channel midi interface.