Choosing accents can be a slightly tricky process. Unicode says that accented letters should be built out of the accents in the range 0x300-0x340, but this does not work too well in postscript. A Type1 font works better if the accented character is in the Adobe Standard Encoding, which means either using accents around 0x2d0 or ascii characters. Pfaedit will first attempt to find an accent around 0x2d0, then in ascii and finally in the 0x300-0x340 range. PfaEdit should know about proper placement of most accents.
Some Unicode characters contain more than one accent.
Additional accents will be treated similarly. Unicode 0x2163 is the roman numeral IV and this command may be used to build it. Alpha looks exactly like Latin capital A and can be created. You should examine all built characters and be prepared to adjust the accent. Only in the font view.