Gator, if you're sister is looking to "set it and forget it", it's best that she diversify into each of the funds. Let me give you a little background on each:
The "Growth opportunites fund" will be invested in domestic large and mid-size cap companies. Similiar basically to a cross between our C and S funds.
The "Overseas fund" will be invested in foreign large and mid-size cap companies. Similar basically to our I fund.
The "Government investment fund" will be invested primarily in US government securities and is somewhat like our G fund although you won't be guaranteed a particular return like our G fund does. I pretty safe fund to be used mainly when one is approaching retirement or when the market is going down.
The "Equity income fund" will be invested primarily in income producing equity securities, ie, large companies that offer dividends. This fund will go up with the market and down, but will not be as volatile as the "growth fund" because of the dividend yields.
The "High Income Advantage Fund" will be invested in primarily high-yield, lower-rated corporate bonds (also known as junk bonds). This is similiar to our F fund although a bit more volatile because it invests in lower-rated corporate bonds while our F fund invests in investment-grade corporate bonds.
The "Prime fund" I am not familar with but I would assume it is similar to a money market type fund which is a fairly safe fund but would only offer minimal returns. Most likely 2 to 4% a year.
Hope this helps,
M_M