Ok so I realize my story line's timeline may need some clarification. basically part 1 part 2 part 3 take place in order as numbered but part 4 takes place during part 5 and part 7. One of the main differences between my story and the original being that multiple story lines are happening at the same time and it's not the Goku show.
Before Goku and Vegeta arive on Namek Vegeta tells Goku that they will have to face Zarbon and Dodoria immediately as they will recognize that Goku is not Nappa. ( And Vegeta just isn't interested in playing the game any more he's had enough) Vegeta is instructed by Zarbon to meet with him and report what happend on Earth. (Zarbon being a higher rank in Freiza army) (( reminder Vegeta's power level when arriving on Namek 16,500 Goku's 5,000)) ((( Zarbon's power level pretty/base form 18,000 Dodoria's power level 15,500))) Goku emerges from Nappa's pod and Vegeta takes a cheap shot on Zarbon starting the four way fight. Goku uses KK x3 and has a close battle with Dodoria. Zarbon takes more of a beating than he expects to but never loses the upper hand against Vegeta. Eventually Zarbon KO's Vegeta and takes him back to their craft to take to Frieza (because Frieza ordered no one to kill Vegeta. Wanting to do it himself. As Frieza suspected the Saiyan prince was up to something on earth) About the same time Goku beats Dodoria with the solar flare then a Kamehameha. Luckily for Goku Zarbon had already begun to leave with Vegeta. Luckily for Vegeta Nail ki blast Zarbon's ship and they crash. (Both are injured and knocked out but ok) Goku sayes Piccolo how did you get here? Nail explains who he is and they go to see if Vegeta is still alive. (well Goku is checking on Vegeta. Nail is hoping he took out Zarbon) Nail has been trying to gather the dragon balls to save his planet but also knows Frieza wants to gather them for himself. Part 6 will be continued later.