1) Yes... the ERIKA Kernel is used every time you compile code generated from Scilab. Please take a look at the files
examplespic30pic30_scicos
That is the template with ID "board_flex" which is used as default by the code generator.
2) It is not yet possible to generate out-of-the-box multirate systems using the Scilab code generator, but it will be probably soon.
A way to obtain that is to generate three separated superblocks, which do not interact. Then you have to generate the code and manually assemble them.
For now the only thing supported out of the box are single rate systems.
3) Of course you can, depending of course from the kind of load you are putting on... the switching power supply has a maximum current which can be supplied! . In any case, take a look at the schematics you find on the FLEX CD-ROM. There you'll find the pinout of the connectors, which have GND and V+ pins you can use.
